Do not have binaries depend on build system timings
because we are building in VMs anyway
and users might have different hardware

Index: graphviz-2.38.0/lib/sfio/features/sfio
===================================================================
--- graphviz-2.38.0.orig/lib/sfio/features/sfio
+++ graphviz-2.38.0/lib/sfio/features/sfio
@@ -260,9 +260,7 @@ tst	output{
 
 		unlink(file);
 	
-		if(4*mmtm <= 3*rdtm)		/* mmap is great! */
-			printf("#define _mmap_worthy	2	\n");
-		else if(4*mmtm <= 5*rdtm)	/* mmap is good	*/
+			/* mmap is good	*/
 			printf("#define _mmap_worthy	1	\n");
 	
 		return 0;